Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa6023ebaf18d81e…

MALICIOUS

PDF

86.0 KB Created: 2021-09-05 10:19:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fcd8b44270b62b1f91494c468b3c5094 SHA-1: 4c0d14900b529afc7edf327b65d0ca538f49c18e SHA-256: fa6023ebaf18d81e2baea86c946925ab3160cdc0cc2748a24dcb0d5663b44207
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan distribution attempt. It contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting it functions as a link farm or redirector to malicious content. The embedded URLs and the overall structure point towards an attempt to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://oniceh.ru/uplcv?utm_term=lincoln+electric+mig+pak+180+wire+feed+welder+manual PDF link annotation
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2d383e9e8---23925171206.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/a634153ceea0ef244a7533946812884b/17506411521.pdfIn PDF document text
    • http://furniture83.com/upload/files/xusagixur.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1cf1dd6800---kokolidib.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/44988891902.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/nolobavuvobovivefejixa.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100f7c5c23bc---zofulitoza.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///79062624124.pdfIn PDF document text
    • http://rowerowaszkola.pl/imgturysta/files/52920683307.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/gepinapokenipobe.pdfIn PDF document text
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/bijometawewufatabekakujo.pdfIn PDF document text
    • http://trendybiz.in/usersfiles/file/5885406029.pdfIn PDF document text
    • http://sieuthivatlieuhoanthien.com/upload/files/94467720810.pdfIn PDF document text
    • https://jobtiara.com/files/files/nikeja.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a1730b948---72771484472.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070bdba0ff33---98491971999.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f08774c6e5---81956340963.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/lajukesanexakasemuzus.pdfIn PDF document text
    • http://cuacuonanbinh.com/userfiles/file/lovakegosonijoda.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/044b1b0b970da809c0cc012539b95ab8/buzijavagetukemutibezire.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160f5f20e3d0e6---sosibigivuzogino.pdfIn PDF document text
    • http://begues.mobi/userfiles/file/tosanat.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/21417033068.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ef752f70a---mupikafubufefupitun.pdfIn PDF document text
    • https://sgcaregiver.org/contents/files/tokoguwiwodilepe.pdfIn PDF document text
    • http://showpelec.com/data/file/20210825_132659_593.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93C 17688 bytes
SHA-256: 9d9fd5bae6063f3a6b6dfe0892f96254bd95ccd37b0ef2f4bbda2ed87f64c758
font_01_sfnt_off00011788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11788 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F9F 11412 bytes
SHA-256: 9bae27cd8264e28f725a658ff66d53e6a58ada5a24bfc92c656e44cdf2c14d2d

Open this report in the interactive analyzer, or submit your own file for analysis.